371results about How to "Avoid emulsification" patented technology

A topical insecticide is provided which can be safe to use and avoids many common deleterious side effects of conventional topical insecticides. The insecticide contains an insecticide and an insect growth regulator effective for killing fleas, flea larvae and flea eggs. The insecticide is formulated by dissolving an insecticidal (tetrahydro-3-furanyl) methylamine derivative or a chloronicotinyl insecticide and an insect growth regulator (IGR) in a solvent containing a quaternary ammonium salt to increase the solvency of the IGR component, thereby providing an insecticide having high insecticidal activity.

The invention relates to a method for separation and purification of fluorescent grade yttrium oxide and europium oxide from waste phosphor powder, comprising the steps of: first conducting impurity removal so as to obtain mischmetal containing Y2O3 and Eu2O3, then dissolving the mischmetal with an acid solution for preparing a rare earth feed liquid, and carrying out extraction with an extraction system after alkaline solvent saponification, thus obtaining the raffinate, washing liquid and strip liquor; adding an oxalic acid solution and conducting filtration, then subjecting the obtained filter residue to calcination, thus obtaining the fluorescent grade yttrium oxide, and yttrium-rich rare earth and europium oxide. The invention has the advantages that, reagents are of wide source, lowprice and easy availability, and the simple process of the method can greatly shorten the extraction process of naphthenic acid. In the invention, three deposition impurity-removal treatments before extraction can remove most impurities and leave only a small amount of aluminium and silicon, so that an emulsification phenomenon in the naphthenic acid extraction system cannot be caused, thus providing a good solution to the problem that naphthenic acid extraction is susceptible to high valent metal ions and results in emulsification.

The invention relates to a method for enriching rare-earth elements from red mud, belonging to the technical field of enriching rare-earth elements and aiming to provide a method for removing silicon and aluminum in red mud and enriching rare-earth elements in the red mud to solve the technical problem. The invention adopts the technical scheme that the method for enriching rare-earth elements from red mud comprises the following steps of: (1) obtaining a red mud hydrochloric acid leaching solution; (2) carrying out desilication treatment to the red mud hydrochloric acid leaching solution obtained in the step (1); (3) adding a NaOH solution at a room temperature to the desilicated red mud hydrochloric acid leaching solution obtained in the step (2), finishing precipitating and separating solid and liquid to obtain a solid containing rare-earth elements; and (4) carrying out dealuminzation treatment to the solid containing rare-earth elements obtained in the step (3). The invention effectively solves an emulsification phenomenon when extracting the rare-earth elements by using a wet method and improves the extraction rate of the rare-earth elements and the purity of the product.

Theinvention provides a scandium element extraction method. The scandium element extraction method comprises the following steps of: (A) mixing alkoxy phenoxy carboxylic acid, tributyl phosphate and a diluting agent to obtain an organic phase; and (B) extracting a scandium-containing mischmetal solution by using the organic phase to obtain a scandium ion-containing solution. The scandium element extraction method has the beneficial effects that the separation selectivity between the scandium element and other rare earth elements can be effectively improved by adopting the alkoxy phenoxy carboxylic acid as the extraction agent on the basis of ensuring the purity of a scandium product and relatively high yield; the concentration of the organic phase is effectively prevented from decreasing after extraction by adopting the tributyl phosphate as an additive, so that the organic phase can be recycled; meanwhile, an emulsion phenomenon in an extraction process can be avoided; and experimental results show that the separation coefficients of the scandium element and a lanthanide element are 526 due to adoption of the scandium element extraction method.

The present invention is production process of high grade piperyene petroleum resin. The piperyene petroleum resin is produced with separated and purified C5 cracking fraction rich in diolefin and coarse pentene to form the copolymerization material liquid in C5 olefin content of 80-92 wt%, AlCl3, main solvent and cosolvent mixed to react to produce cationic complex polymerization catalyst, and recovered C5 fraction as polymerization solvent, and through polymerization at 10-80 deg.c and 0.03-0.40 MPa for 2-5 hr, and neutralization and water washing after polymerization. The piperyene petroleum resin has high softening point, low color hue, high transparency, low melt viscosity, high heat resistance and high weather resistance. The production process has reaction yield up to 92-96 % and low production cost.

The invention relates to a high-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as a leaching agent. The method comprises the steps of preparing a leaching agent solution; leaching ion-absorbed-type rear earth, using primary amine for extracting rare earth, uranium, thorium and ferrum from the leaching solution and reverse extracting the rare earth, the uranium, the thorium and the ferrum from an extraction organic phase; using p227 for extracting heavy rare earth, the uranium and the thorium from a reverse extraction liquid; using hydrochloric acid for reverse extracting and separating the rare earth from the uranium and the thorium; using hydroxide and basic oxide for precipitating residual aluminium-ferrum-thorium from the reverse extraction liquid; preparing rare earth products with different specifications through a precipitation method; unoiling and recycling a raffinate; recycling precipitated wastewater; protonizing an extracted organic phase; and the like. According to the method, the leaching efficiency of the current ion-absorbed-type rear earth can be remarkably improved, the emission of harmful elements is greatly reduced, radioactive elements such as the uranium and the thorium are reasonably treated and recovered, the pollutant load in a tail water immersion liquid is ensured to meet the emission requirement, the security and the stability of tailings are improved, and the method is a key technology for realizing high-efficient and green ion-absorbed-type rear earth extraction.

The invention provides a hydraulic oil. The hydraulic oil comprises, by weight, 70-90 parts of poly-alpha-olefin, 10-30 parts of a diester compound, 0.1-3 parts of an antioxidant, 0.1-0.5 parts of an antirust agent, 0.1-5 parts of an extreme pressure anti-wear agent, 0.0005-0.05 parts of an antifoaming agent, 0.001-0.1 parts of a coloring agent and 5-20 parts of a viscosity improver. The use amounts of all components and the comprehensive effects of all the components are controlled to make the hydraulic oil have good low-temperature performances and high flash point. Experiment results that the hydraulic oil can be used at -50DEG C, and the flash point of the hydraulic oil is 172-182DEG C. The hydraulic oil provided by the invention has the advantages of good viscosity-temperature properties, high burning point, good anti-foaming performance and good oxidation stability.

The preparation method of natural benzaldehyde relates to a kind of benzaldehyde, and provides a new method for preparing natural benzaldehyde by hydrolyzing cinnamon oil under alkaline conditions. Add water to organic base, Na2CO3, and cationic surfactant; heat the mixed aqueous solution, drop in cinnamon oil; condense and collect the product; when the amount of the collected oil phase is only 8% to 12% of the initial amount, stop adding water, when the benzaldehyde When the content is reduced to less than 10% and the cinnamaldehyde content is greater than 60%, the reaction is stopped. Avoid the polymerization and disproportionation reaction of products under strong alkaline conditions, and reduce the amount of benzene and toluene generated due to the existence of small molecule OH-. The use of cationic surfactant instead of nonionic surfactant avoids saponification and emulsification of the product, and the reaction rate is greatly improved. The side reactions such as polymerization and disproportionation of the product are directly reduced. The reaction time of the process is shortened; the yield of the main product of the reaction is increased.

The invention discloses an integrated hydro-pneumatic spring device. An inerter working chamber is coaxially arranged in a damping working cylinder, a piston portion in the inerter working chamber is arranged as a screw rod structure, a ball screw nut is arranged on the screw rod in the inerter working chamber according to a ball screw principle, a flywheel is coaxially fixed on the ball screw nut, the nut is limited in the middle section and can only rotate around the screw rod through two stop collars fixed at the top and bottom of the working cylinder, and ball circular grooves are arranged on contact surfaces of the stop collars with the nut. As an improvement, self-weight of a vehicle body is not increased when sprung mass of a suspension is improved, driving comfort and handling stability of vehicles are improved, complex mechanical network combined process is avoided, and spatial arrangement limitation is reduced due to coaxial parallel connection of the inerter and the damping.

The invention provides a microfluid extraction method for extracting and separating In, Fe and Zn. The microfluid extraction method comprises the steps of: using a sulfuric acid system solution containing indium, ferrum and zinc as a water phase and a P204 extracting agent diluted through solvent oil as an organic phase, which are respectively fed into two flow pumps, wherein the outlet end of the flow pump is connected with an inlet of a microreactor; simultaneously, observing a two-phase laminar flow phase interface formed inside a microchannel through an optical microscope, so that two phases flow in parallel and then begins to be separated when reaching a Y-type fork at the outlet of the microchannel, and the two phases flow out of the microreactor from outlets of the two phases; respectively collecting the two phases; and extracting indium to enter the organic phase and leaving ferrum and zinc in the water phase, so that the separation of indium, ferrum and zinc is realized. The extraction rate of In can be up to more than 90%, but ions of Fe and Zn are not extracted completely; moreover, no emulsion appears; and reaction time is greatly shortened, the using amount and consumption of the extracting agent can be reduced, the condition controllability is high, the safety is high, and extracted organic solvent is prevented from being exposed in the air.

The invention discloses a molten steel vacuum refining system based on a mechanical pump group. The system comprises a vacuum tank, a deduster, a roots pump group and a pre-screw pump, wherein the roots pump group comprises a main roots pump, a first middle roots pump and a second middle roots pump; the deduster is also directly connected with the pre-screw pump through a pipeline; the bottom of the vacuum tank is connected with an argon system; the system also comprises a controller; the first middle roots pump, the second middle roots pump and the pre-screw pump are all electrically connected with the controller; the main roots pump is electrically connected with the controller through a frequency converter; a liquid level sensor is arranged at the upper part of the inner wall of a refining furnace of the vacuum tank; the liquid level sensor is electrically connected with the controller; a vacuum degree measuring device is mounted on a pipeline between the deduster and the main roots pump; and the vacuum degree measuring device is connected with the controller. The system disclosed by the invention can perform automatic control to realize stable liquid surface of the molten liquid in the refining furnace of the vacuum tank to prevent steel overflow, thereby avoiding production safety accident.

The invention discloses a hydraulic damper. The hydraulic damper comprises an oil cylinder barrel, a piston and a piston rod. A working cavity is arranged in the oil cylinder barrel. The piston is arranged in the working cavity. The working cavity is divided into a first working cavity and a second working cavity. One end of the piston rod is arranged on the piston. The other end of the piston rod penetrates through the first working cavity to be arranged outside the oil cylinder barrel. A compensation cavity is further arranged in the oil cylinder barrel. The compensation cavity is located at the end, far away from the first working cavity, of the second working cavity. A flow direction control assembly is arranged between the compensation cavity and the second working cavity. The hydraulic damper has the advantages of being simple in structure, small in size, high in reliability, long in service life, high in universality and the like.

A method for extracting edible cornus wilsoniana seed oil from fresh cornus wilsoniana seed fruits at a low temperature comprises the following steps of: taking fresh mature cornus wilsoniana seeds as raw materials, cleaning the seeds, crushing and grinding the seeds into pulp by means of a crusher at a rotating speed of 10-100 r/min, adding water accounting for 30-200% of the weight of the raw materials to the pulp, performing stirring blending at a temperature ranging from 25 to 50 degrees centigrade for 10-120 r/min, and then performing solid-liquid separation through centrifuging to obtain solid residues and an oil-water mixture, and finally performing oil-water separation through centrifuging. The method for extracting edible cornus wilsoniana seed oil from fresh cornus wilsoniana seed fruits at the low temperature is to extract the oil at the low temperature, thereby effectively preventing the emulsification of oil and facilitating oil separation; the oil extraction ratio is greater than 97%; the obtained oil is low in tincture and acid value; the special flavor of the vegetable oil can be kept; the active components of the vegetable oil are not damaged; and the extracted cornus wilsoniana seed oil contains abundant nutrition components without benzo(a)pyrene and trans fatty acid; therefore, the oil can be directly eaten.

A process for alkali washing of oil to remove acid, salt and metal ions features that the raw oil is washed by the alcohol solution of sodium hydroxide in a mixer which is divided into upper and lower layers by the dispersing medium. The alcohol solution of sodium hydroxide in upper layer is dispersed into microdrops by said dispersing medium and then reacts on the raw oil in lower layer. After separation, the pure oil is obtained.

The invention discloses a demulsification method in production processes for extracting tea-seed oil extraction with the participation of a water phase, relates to a technology for breaking an oil-water emulsification state during tea-seed oil production, and in particular to a technology for breaking emulsification in production processes for extracting tea-seed oil extraction with the participation of a water phase, such as an aqueous enzymatic method, an aqueous solution method or an aqueous extraction method. The technical scheme is as follows: after tea seeds are moderately crushed, an appropriate amount of water phase is added, and the purpose of breaking an oil-water emulsification phenomenon is achieved by virtue of the comprehensive methods of increasing temperature, regulating pH value and centrifugally separating. The method provided by the invention is simple, feasible and strong in practicability, solves the problem of a low oil yield caused by the fact that oil and water are seriously emulsified and difficult to separate in a water-phase oil extraction process, and is beneficial to actual industrial application and popularization for the water-phase tea-seed oil extraction process technology.

The invention provides a method for comprehensively extracting polysaccharides, polyphenol and saponin from camellia oleifera abel defatted cakes. The method includes the following steps: obtaining polysaccharides through aqueous extraction, concentration, deproteinization and ethanol precipitation after the camellia oleifera abel defatted cakes are degreased; concentrating and adding salt into the supernatant after the ethanol precipitation of the polysaccharides, and performing extraction to obtain the polyphenol through ethyl acetate; and absorbing and analyzing the aqueous phase after extraction of the polyphenol through resin to obtain the saponin. According to the method, effects of substances such as the polysaccharides and the polyphenol during extraction of the saponin are overcome, and the purity of the saponin is improved; and the polysaccharides, the polyphenol and the saponin are obtained, and the defect of low utilization rate of camellia oleifera abel defatted cakes in the existing methods is overcome.